Class: Reginald::Parser

Inherits:
Racc::Parser
  • Object
show all
Defined in:
lib/rack/mount/vendor/reginald/reginald/parser.rb,
lib/rack/mount/vendor/reginald/reginald/tokenizer.rb

Overview

:nodoc: all

Defined Under Namespace

Classes: ScanError

Constant Summary collapse

Racc_arg = 
[
racc_action_table,
racc_action_check,
racc_action_default,
racc_action_pointer,
racc_goto_table,
racc_goto_check,
racc_goto_default,
racc_goto_pointer,
racc_nt_base,
racc_reduce_table,
racc_token_table,
racc_shift_n,
racc_reduce_n,
racc_use_result_var ]
Racc_token_to_s_table = 
[
"$end",
"error",
"BAR",
"LBRACK",
"RBRACK",
"NEGATE",
"CCLASS",
"DOT",
"CHAR",
"LPAREN",
"RPAREN",
"QMARK",
"COLON",
"NAME",
"L_ANCHOR",
"R_ANCHOR",
"STAR",
"PLUS",
"LCURLY",
"RCURLY",
"\"alnum\"",
"\"alpha\"",
"\"ascii\"",
"\"blank\"",
"\"cntrl\"",
"\"digit\"",
"\"graph\"",
"\"lower\"",
"\"print\"",
"\"punct\"",
"\"space\"",
"\"upper\"",
"\"word\"",
"\"xdigit\"",
"MINUS",
"MULTILINE",
"IGNORECASE",
"EXTENDED",
"$start",
"expression",
"branch",
"atom",
"quantifier",
"group",
"ctype",
"bracket_expression",
"anchor",
"options",
"modifier" ]
Racc_debug_parser = 
false

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 26

def initialize
  @capture_index = 0
  @capture_index_stack = []
  @options_stack = []
end

Instance Attribute Details

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 15

def filename
  @filename
end

#lineno ⇒ Object (readonly)

Returns the value of attribute lineno.



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 14

def lineno
  @lineno
end

#options_stack ⇒ Object

Returns the value of attribute options_stack.



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 24

def options_stack
  @options_stack
end

#state ⇒ Object

Returns the value of attribute state.



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 16

def state
  @state
end

Class Method Details

.parse_regexp(regexp) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 11

def self.parse_regexp(regexp)
  parser = new
  parser.options_stack << {
    :multiline => (regexp.options & Regexp::MULTILINE != 0),
    :ignorecase => (regexp.options & Regexp::IGNORECASE != 0),
    :extended => (regexp.options & Regexp::EXTENDED != 0)
  }

  expression = parser.scan_str(regexp.source)
  expression.options = regexp.options
  expression
end

Instance Method Details

#_reduce_1(val, _values, result) ⇒ Object

reduce 0 omitted



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 288

def _reduce_1(val, _values, result)
 result = Expression.new(Alternation.reduce(val[0], val[2])) 
    result
end

#_reduce_10(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 331

def _reduce_10(val, _values, result)
 result = CharacterClass.new(val[2]); result.negate = true 
    result
end

#_reduce_11(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 336

def _reduce_11(val, _values, result)
 result = CharacterClass.new(val[0]) 
    result
end

#_reduce_12(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 341

def _reduce_12(val, _values, result)
 result = CharacterClass.new('.') 
    result
end

#_reduce_13(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 346

def _reduce_13(val, _values, result)
 result = Anchor.new(val[0]) 
    result
end

#_reduce_14(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 351

def _reduce_14(val, _values, result)
 result = Character.new(val[0]) 
    result
end

#_reduce_15(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 356

def _reduce_15(val, _values, result)
          result = Group.new(val[1])
          result.index = @capture_index_stack.pop
        
    result
end

#_reduce_16(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 363

def _reduce_16(val, _values, result)
          result = Group.new(val[4]);
          result.capture = false;
          options = val[2];
          result.expression.multiline  = options[:multiline];
          result.expression.ignorecase = options[:ignorecase];
          result.expression.extended   = options[:extended];
          @options_stack.pop
        
    result
end

#_reduce_17(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 375

def _reduce_17(val, _values, result)
          result = Group.new(val[3]);
          result.capture = false;
        
    result
end

#_reduce_18(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 382

def _reduce_18(val, _values, result)
          result = Group.new(val[3]);
          result.name = val[2];
          result.index = @capture_index_stack.pop
        
    result
end

#_reduce_2(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 293

def _reduce_2(val, _values, result)
 result = Expression.reduce(val[0]) 
    result
end

#_reduce_24(val, _values, result) ⇒ Object

reduce 23 omitted



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 400

def _reduce_24(val, _values, result)
 result = val.join 
    result
end

#_reduce_25(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 405

def _reduce_25(val, _values, result)
 result = val.join 
    result
end

#_reduce_26(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 410

def _reduce_26(val, _values, result)
 result = val.join 
    result
end

#_reduce_27(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 415

def _reduce_27(val, _values, result)
 result = val.join 
    result
end

#_reduce_3(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 298

def _reduce_3(val, _values, result)
            val[1].quantifier = val[2]
            result = Expression.reduce(val[0], val[1])
          
    result
end

#_reduce_30(val, _values, result) ⇒ Object

reduce 29 omitted



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 424

def _reduce_30(val, _values, result)
 result = CharacterClass::ALNUM 
    result
end

#_reduce_31(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 429

def _reduce_31(val, _values, result)
 result = CharacterClass::ALPHA 
    result
end

#_reduce_32(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 434

def _reduce_32(val, _values, result)
 result = CharacterClass::ASCII 
    result
end

#_reduce_33(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 439

def _reduce_33(val, _values, result)
 result = CharacterClass::BLANK 
    result
end

#_reduce_34(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 444

def _reduce_34(val, _values, result)
 result = CharacterClass::CNTRL 
    result
end

#_reduce_35(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 449

def _reduce_35(val, _values, result)
 result = CharacterClass::DIGIT 
    result
end

#_reduce_36(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 454

def _reduce_36(val, _values, result)
 result = CharacterClass::GRAPH 
    result
end

#_reduce_37(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 459

def _reduce_37(val, _values, result)
 result = CharacterClass::LOWER 
    result
end

#_reduce_38(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 464

def _reduce_38(val, _values, result)
 result = CharacterClass::PRINT 
    result
end

#_reduce_39(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 469

def _reduce_39(val, _values, result)
 result = CharacterClass::PUNCT 
    result
end

#_reduce_4(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 305

def _reduce_4(val, _values, result)
 result = Expression.reduce(val[0], val[1]) 
    result
end

#_reduce_40(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 474

def _reduce_40(val, _values, result)
 result = CharacterClass::SPACE 
    result
end

#_reduce_41(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 479

def _reduce_41(val, _values, result)
 result = CharacterClass::UPPER 
    result
end

#_reduce_42(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 484

def _reduce_42(val, _values, result)
 result = CharacterClass::WORD  
    result
end

#_reduce_43(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 489

def _reduce_43(val, _values, result)
 result = CharacterClass::XDIGIT 
    result
end

#_reduce_44(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 494

def _reduce_44(val, _values, result)
            @options_stack << result = { val[1] => false, val[2] => false, val[3] => false }
          
    result
end

#_reduce_45(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 500

def _reduce_45(val, _values, result)
            @options_stack << result = { val[0] => true, val[2] => false, val[3] => false }
          
    result
end

#_reduce_46(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 506

def _reduce_46(val, _values, result)
            @options_stack << result = { val[0] => true, val[1] => true, val[3] => false }
          
    result
end

#_reduce_47(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 512

def _reduce_47(val, _values, result)
            @options_stack << result = { val[0] => true, val[1] => true, val[2] => true }
          
    result
end

#_reduce_48(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 518

def _reduce_48(val, _values, result)
 result = :multiline 
    result
end

#_reduce_49(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 523

def _reduce_49(val, _values, result)
 result = :ignorecase 
    result
end

#_reduce_5(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 310

def _reduce_5(val, _values, result)
            val[0].quantifier = val[1]
            result = val[0]
          
    result
end

#_reduce_50(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 528

def _reduce_50(val, _values, result)
 result = :extended 
    result
end

#_reduce_8(val, _values, result) ⇒ Object

reduce 7 omitted



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 321

def _reduce_8(val, _values, result)
 result = val[1] 
    result
end

#_reduce_9(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 326

def _reduce_9(val, _values, result)
 result = CharacterClass.new(val[1]) 
    result
end

#_reduce_none(val, _values, result) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/parser.rb', line 533

def _reduce_none(val, _values, result)
  val[0]
end

#action(&block) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 24

def action(&block)
  yield
end

#load_file(filename) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 33

def load_file( filename )
  @filename = filename
  open(filename, "r") do |f|
    scan_setup(f.read)
  end
end

#next_token ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 46

def next_token
  return if @ss.eos?

  text = @ss.peek(1)
  @lineno  +=  1  if text == "\n"
  token = case @state
  when nil
    case
    when (text = @ss.scan(/\\[dDsSwW]/))
       action { [:CCLASS, text] }

    when (text = @ss.scan(/\^|\\A/))
       action { [:L_ANCHOR, text] }

    when (text = @ss.scan(/\$|\\Z/))
       action { [:R_ANCHOR, text] }

    when (text = @ss.scan(/<(\w+)>/))
       action { [:NAME, @ss[1]] }

    when (text = @ss.scan(/\(/))
       action {
  @capture_index_stack << @capture_index
  @capture_index += 1
  @state = :OPTIONS if @ss.peek(1) == '?';
  [:LPAREN, text]
}


    when (text = @ss.scan(/\)/))
       action { [:RPAREN,  text] }

    when (text = @ss.scan(/\[/))
       action { @state = :CCLASS; [:LBRACK,  text] }

    when (text = @ss.scan(/\{/))
       action { [:LCURLY,  text] }

    when (text = @ss.scan(/\}/))
       action { [:RCURLY,  text] }

    when (text = @ss.scan(/\|/))
       action { [:BAR, text]   }

    when (text = @ss.scan(/\./))
       action { [:DOT, text]   }

    when (text = @ss.scan(/\?/))
       action { [:QMARK, text] }

    when (text = @ss.scan(/\+/))
       action { [:PLUS,  text] }

    when (text = @ss.scan(/\*/))
       action { [:STAR,  text] }

    when (text = @ss.scan(/\#/))
       action {
  if @options_stack[-1][:extended]
    @state = :COMMENT;
    next_token
  else
    [:CHAR, text]
  end
}


    when (text = @ss.scan(/\s|\n/))
       action {
  if @options_stack[-1][:extended]
    next_token
  else
    [:CHAR, text]
  end
}


    when (text = @ss.scan(/\\(.)/))
       action { [:CHAR, @ss[1]] }

    when (text = @ss.scan(/./))
       action { [:CHAR, text] }

    else
      text = @ss.string[@ss.pos .. -1]
      raise  ScanError, "can not match: '" + text + "'"
    end  # if

  when :CCLASS
    case
    when (text = @ss.scan(/\]/))
       action { @state = nil; [:RBRACK, text] }

    when (text = @ss.scan(/\^/))
       action { [:NEGATE, text] }

    when (text = @ss.scan(/:(alnum|alpha|ascii|blank|cntrl|digit|graph|lower|print|punct|space|upper|word|xdigit):/))
       action { [@ss[1], text] }

    when (text = @ss.scan(/\\-/))
       action { [:CHAR, text] }

    when (text = @ss.scan(/\\(.)/))
       action { [:CHAR, @ss[1]] }

    when (text = @ss.scan(/./))
       action { [:CHAR, text] }

    else
      text = @ss.string[@ss.pos .. -1]
      raise  ScanError, "can not match: '" + text + "'"
    end  # if

  when :OPTIONS
    case
    when (text = @ss.scan(/\?/))
       action {
  @state = nil unless @ss.peek(1) =~ /-|m|i|x|:/
  [:QMARK, text]
}


    when (text = @ss.scan(/\-/))
       action { [:MINUS, text] }

    when (text = @ss.scan(/m/))
       action { [:MULTILINE, text] }

    when (text = @ss.scan(/i/))
       action { [:IGNORECASE, text] }

    when (text = @ss.scan(/x/))
       action { [:EXTENDED, text] }

    when (text = @ss.scan(/\:/))
       action {
  @capture_index_stack.pop
  @capture_index -= 1
  @state = nil;
  [:COLON, text]
}


    else
      text = @ss.string[@ss.pos .. -1]
      raise  ScanError, "can not match: '" + text + "'"
    end  # if

  when :COMMENT
    case
    when (text = @ss.scan(/\n/))
       action { @state = nil; next_token }

    when (text = @ss.scan(/./))
       action { next_token }

    else
      text = @ss.string[@ss.pos .. -1]
      raise  ScanError, "can not match: '" + text + "'"
    end  # if

  else
    raise  ScanError, "undefined state: '" + state.to_s + "'"
  end  # case state
  token
end

#scan_file(filename) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 40

def scan_file( filename )
  load_file(filename)
  do_parse
end

#scan_setup(str) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 18

def scan_setup(str)
  @ss = StringScanner.new(str)
  @lineno =  1
  @state  = nil
end

#scan_str(str) ⇒ Object 



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# File 'lib/rack/mount/vendor/reginald/reginald/tokenizer.rb', line 28

def scan_str(str)
  scan_setup(str)
  do_parse
end